
Hi...
Ummmm... its a
"little" bizzare... my b/f loves having anal sex, it isn't the most enjoyable thing for me though. I love that it turns him on and it does feel good but NOWHERE near as good as regular sex.
Have you ever tried having regular sex with her and putting your finger back there? That also feels really good maybe she'll like that... I guess there are alot of girls who like the "double penitration"... Try it (if you haven't)
Has your g/f had sex before you? Both anal and regular? Maybe its just her thing

... if it bothers you just tell her... Oh and she may need to go to the gyno though just to see whats up... and why she cant feel anything....
Hope this helps... Good Luck!!
-thats mE